KLI

Modified GSC Method to Reduce the Distortion of the Enhanced Speech Signal Using Cross-Correlation and Sidelobe Neutralization

Metadata Downloads
Abstract
The generalized sidelobe canceller (GSC) method is a common algorithm to enhance audio signals using a microphone array. Distortion of the enhanced audio signal consists of two parts: the residual acoustic noise and the distortion of the desired audio signal, which means that the desired audio signal is damaged. This paper proposes a modified GSC method to reduce both kinds of distortion when the desired audio signal is a non-stationary speech signal. First, the cross-correlation coefficient between the canceling signal and the error signal of the least mean square (LMS) algorithm was added to the adaptive process of the GSC method to reduce the distortion of the enhanced signal while the energy of the desired signal frame was increased suddenly. The sidelobe pattern of beamforming was then presented to estimate the noise signal in the beamforming output signal of the GSC method. The noise component of the beamforming output signal was decreased by subtracting the estimated noise signal to improve the denoising performance of the GSC method. Finally, the GSC-SN-MCC method was proposed by merging the above two methods. The experiment was performed in an anechoic chamber to validate the proposed method in various SNR conditions. Furthermore, the simulated calculation with inaccurate noise directions was conducted based on the experiment data to inspect the robustness of the proposed method to the error of the estimated noise direction. The experiment data and calculation results indicated that the proposed method could reduce the distortion effectively under various SNR conditions and would not cause more distortion if the estimated noise direction is far from the actual noise direction.
Author(s)
서항이장명
Issued Date
2021
Type
Article
Keyword
cross-correlationgeneralized sidelobe cancellermicrophone arraysidelobe neutralization
DOI
10.3390/app11146288
URI
https://oak.ulsan.ac.kr/handle/2021.oak/8900
https://ulsan-primo.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=TN_cdi_doaj_primary_oai_doaj_org_article_e6b9d8818aca4a69b02b1e9ccb63bcfe&context=PC&vid=ULSAN&lang=ko_KR&search_scope=default_scope&adaptor=primo_central_multiple_fe&tab=default_tab&query=any,contains,Modified%20GSC%20Method%20to%20Reduce%20the%20Distortion%20of%20the%20Enhanced%20Speech%20Signal%20Using%20Cross-Correlation%20and%20Sidelobe%20Neutralization&offset=0&pcAvailability=true
Publisher
APPLIED SCIENCES-BASEL
Location
스위스
Language
영어
ISSN
2076-3417
Citation Volume
11
Citation Number
14
Citation Start Page
0
Citation End Page
0
Appears in Collections:
Engineering > Mechanical and Automotive Engineering
Authorize & License
  • Authorize공개
Files in This Item:
  • There are no files associated with this item.

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.